Gyrating sifter.



PATENTED APR. 5, 1904.

J. M. SGHUTZ.

GYRATING SIFTER.

APPLICATION FILED SEPT. a, 1899.

3 SHEETS-SHEET 1.

N0 MODEL.

INVENTQP'.

J osEPH M. Sc H u-rz WITN Hrs ATTQRN EYS PATENTED APR. 5, 1904.

J. M. SGHUTZ.

GYRATING SIFTER.

APPLIOATION FILED SEPT. a, 1899.

3 SHEETSSHEET 3.

N0 MODEL.

INVENTQR JOSEPl-l M. SCI"! UTZ.

- WITNESSES H18 A TTORN EY'5.

UNTTED STATES Patented April 5, 1904.

PATENT OFFICE.

JOSEPH M. SOHUTZ, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO THESCHUT7-ONEILL COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPO- RATION OFMINNESOTA.

GYRATING SIFTER.

SPECIFICATION forming part of Letters Patent No. 756,292, dated April 5,1904.

Application filed September 8, 1899. Serial No- 729,816. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH M. SoHUTZ, of the city of Minneapolis, countyof Hennepin, State of Minnesota, have invented certain new and usefulImprovements in Gyrating Sifters,

of which the following is a specification.

My invention relates, primarily, to means for producing gyratory motion;and the invention relates particularly to gyrating machines forl siftingflour and powder of various materia s.

The object of the invention is to provide simple means to gyrate aworking part or machine member, such as the sieve of a boltingmachine, aconcentrating-belt, or the like.

The particular object of the invention is to dispense with gyratingbody-hangers and pivotal supports, both of which are commonly employedin such machines.

A further object of the invention is to improve and cheapen theconstruction and lessen the cost of operating sifting, bolting, andseparating machines; and still another object is to perfectly balancegyrating machines, where and will require little power for theiroperation.

With these objects in View my invention consists generally in a plate onthe machine body or member that performs the work and a drivingcrank-shaft that is preferably perpendicular to said plate, incombination with positively-operating and preferably sliding meansinterposed between said plate and a fixed support preventing therotation of the plate or body and restricting its movement to gyration;and my invention also consists particularly in a machine the workingmember of which (the sieve) is wholly supported and 4 driven frombeneath; and, further, the invention consists in various details ofconstruction and in combinations of parts, all as hereinafter described,and particularly pointed out in the claims.

The invention will be more readily understood by reference to theaccompanying drawings, forming part of this specification, and in whichFigure 1 is a perspective view of a gyratby the same may be made tooperate smoothly ing sifter embodying my invention. Figs. 2, 3, 4, and 5are small diagrams illustrating the gyratory movement. Fig. 6 is a sideelevation of the machine with the sieve-frame in section. Fig. 7 is aperspective section on line y y of Fig. 8. Fig. 8 is a plan view on theline as of Fig. 6. Fig. 9 is a plan view of the sieve-frame on the line2 z of Fig. 6.

As shown in the drawings, the sieve box or body instead of being made upof a number of sieves placed within a box of a given size, as is theusual custom, is composed of a number of sectionsnamely, the top andbottom sections 2 and 3 and one or more sieve-sections 4, which latter,as shown, carries the cloth 5. The top of the top section is closed by awooden or sheet-metal plate 6, and the bottom of the lower section 3 isclosed by a similar plate 7. The outer frames of the sections and thetop and bottom plates compose the sieve-box, and the sections arefastened by bolts 8 passing through the outer frames. These bolts, asshown in Fig. 6, are preferably longer than are required for but athreesection box in order that other sieve-sections may be added withoutchanging the bolts. The sections 2 and 3 are provided withdividing-strips that have flights 9 for advancing the stock. The stockis fed into the top section and upon the sieve through the spout 10. Thetailings are taken from the sieve through the spout 11, and the goodstock is taken from the bottom section through the spout 12. Thissieve-box is vibrated or gyrated at a high speed by the mechanism thatis arranged beneath the box between the same and the base whereon thesieve-box is supported, as will appear hereinafter. To keep thesieve-cloth clear, I employ the automatic knocker or knockersillustrated in the drawings. As shown in Figs. 6, 7 and 9, the knockercomprises the simple metallic tube 13, preferably of lead, having itsends protected by steel bushings 14 and adapted to slide upon a smallrod or wire 15, that extends between the dividing-strips of thesieve-frame 4:. I prefer to employ two such knockers in eachsieve-frame. Such devices are not required in the top and bottombox-sections 2 and 3.

The throw of the Weights is preferably slightly less than the gyratorythrow of the sieve, and with each movement of the sieveframe the knockeror tubular weight will be struck forcibly against the sieve-frame to jarthe cloth thereof. It is of distinct advantage to apply the jarringstrokes of the knocker to the inner or middle portion of thesieve-frame, as the shock is then distributed throughout the sieve clothand frame. Although the knockers are preferably concealed within thesieve-box, it is obvious'that they may be arranged on rods on theexterior of the frame.

The machine-base, before referred to, is preferably made in upper andlower parts 16 and 17. The gyrating mechanism, including the slide, isarranged in the upper part of the base, which upper part is providedwith the arms 18 18 and the bracket 19.

20 represents a vertical shaft having a vertical bearing 21 in the upperbase part and preferably extended to the bottom of the lower part of thebase, where it is provided with an adjustable step-bearing 22. Upon theupper end of the shaft 20 is a crank 23, having a crank-pin 24, and-theshaft 20 is rotated from the horizontal driving-shaft 25, havingbearings in the arm and bracket and connected with the shaft 20 bybevel-gears 26. There are a fixed and a loose belt-pulley on the outerend of the shaft 25.

' The sieve-box rests upon the plate 27 which plate is provided with adepending sleeve or boss 28, into which the crank-pin 24 projects, thusforming the connection between the sieve-box and the verticaldriving-shaft; The crank-pin preferably carries the weight of thesievebox. It is obvious that unless means are provided to hold thesieve-box said box'would rotate with the crank and about the same as acenter and would partake of but little gyratory movement. It istherefore necessary to interpose between the crankshaft and the plate orthe working member namely, the sievesome means capable of angularmovement and not capable of rotation to hold or restrain the sieve-boxand limit the same to gyration. For this purpose I prefer to employ aslide preferably composed of two or more angularly-related arms, forminga sliding tie or working connection between the plate 27 and the base ofthe machine and preventing vertical movement of the sieve-box and alsopreventing the rotation thereof. These slide-arms are preferably rigidlyjoined in the form of a cross and have slidable connections with thebase and plate, respectively. The plate 27 is provided with two hangers29 29, having slide-bearings 30, that are in line with the boss orsleeve 28 to slide upon the cross-arms 31, that extend from oppositesides of the reciprocating ring 32, from the other quarters of which theslide-arms 33 extend. The last-mentioned arms 33 are adapted to slideback and forth in the bearings 34, provided at the upper ends of thearms 18 upon the base. These bearings 34 are in line with the center ofthe shaft 20. It is also obvious that as the crank rotates the ring 32and the arms thereon will be thrown from side to side between the arms18, While in the same revolution the plate will be moved transversely,sliding upon the cross-arms 31. As before stated, the boss or sleeve andthe crank-pin hold the plate, so that there is no tilting of thesieve-box, and the plate 27 may, if desired, be carried by the bearings34. It is obvious that the opposite slide-arms 31 and 33 need not be inthe same plane, and, further, that the plate 27 may be inclined, ifdesired, and that the oscillation of said plate in addition to gyrationmay be obtained by simply arranging the cross at a slight angle. Thethrow and the weight of the parts above the crank are compensated by thecounterbalance weight or sector 35 upon the driving-shaft 20, by whichthe whole machine is perfectly balanced to operate without undue wearupon its bearings and so that the machine may be worked withcomparatively little power. It is evident that a cam may take the placeof the, crank and that the angularly-movable slide-arms may be arrangedin a vertical instead of a horizontal plane; but I prefer theconstruction shown, because the single sliding cross serves not only toprevent any movement other than gyration, but also holds together thebase and the vibrating plate, making other ties, hangers, or jointsunnecessary.

While the gyrating mechanism herein exemplified is particularly adaptedfor sifting machines upon the order of plan-sifters, I do not confine myinvention thereto; nor do I confine my invention to the specificconstructions herein shown and described.

Having thus described my invention, I claim as new and d esire to secureby Letters Patent 1. In agyrating sift-er, the sieve-box in'com binationwith the base, the rotary mechanism in said base engaging said sieve-boxto operate the same and the rigid slide having oppositely-arrangedconnections with said box and base and limiting the movement of said boxto gyration, substantially as described.

2. In a gyrating machine, the combination of the gyrating plate ormember with power actuatingmeans for driving said plate, suitablebearings movable with said plate and substantially parallel thereto,suitable base-bearings thereon substantially parallel to said plate andat right angles to aforesaid bearings, and a slide operating in saidbearings and thereby supporting said plate and limiting the movementthereof to gyration, substantially as described.

3. The combination, in the gyrating ma chine, of the gyrating membercarrying bearings substantially parallel to the plane thereof, asuitable base having bearings at right angles to the bearings upon saidmember, a

slide member having parts held in the bearings of said member and baseand tying said member upon said base and limiting the movement thereofto gyration and means for driving said gyrating member, substantially asdescribed.

4. The combination in a gyrating machine of the gyrating member carryingbearings substantially parallel to the plane thereof, a suitable basehaving bearings at right angles to the bearings upon said member, aslide member having parts held in the bearings of said member and base,tying said member upon said base and limiting the movement thereof togyration and rotary means substantially perpendicular to said member forgyrating the same, substantially as described.

5. The combination, in a gyrating machine, of the gyrating member withthe crank-shaft for operating it, and base-bearings, upon said memberand base, at right angles to one an other and a slide interposed betweensaid base and member and having arms slidably held in said bearings andlimiting the movement of said member to gyration, substantially asdescribed.

6. The combination, in a gyrating machine, of the gyrating plate, withthe crankshaft substantially perpendicular thereto, a base or fixedpart, bearings arranged respectively upon said fixed part and plate, atright angles to one another, and the rigid arms slidably held in saidbearings and permitting the gyration only of said plate by saidcrank-shaft, substantially as described.

7. In a machine of the class described, the combination, with the base,of a crank-shaft, suitable means for rotating the same, a bedplatecarried upon the crank-pin, and the four horizontally-sliding partsinterposed between said bed-plate and the base of the machine in a planeperpendicular to said crank-pin and supporting said plate, substantiallyas described.

8. In a machine of the class described, the combination, with the base,of a crank-shaft, and means for driving the same, the bed-plate carriedupon the crank of said crank-shaft to gyrate in a plane substantiallyperpendicular to said crankshaft, and the sliding cross having two ofits arms engaged with said bedplate and two engaged with said base,substantially as described.

9. The combination, in a machine of the class described, of the base,with the vertical crank-shaft, the bed-plate mounted upon the crank ofsaid shaft as a center, and the sliding cross having two of its armsheld in bearings upon said base and the other two held in bearings uponsaid bed-plate, and a counterbalance upon said crank-shaft,substantially as described.

10. In a gyrating sifter, the combination, with the base, of thecrank-shaft, the bed-plate having the crank of said shaft as its center,the four-way cross slidable in bearings upon said base and in bearingsupon said bed-plate to prevent the rotation of said bed-plate whilepermitting the gyration of said bedplate by said crank, and the sievesarranged upon said bed-plate, substantially as described.

11. In a gyrating machine, the combination of the gyrating memberprovided with the bearing perpendicular thereto and also provided withbearings parallel to said member and base, a crank-shaft mounted thereinand having its crank-pin journaled in the firstmentioned bearing andpreventing the tilting of said member with. respect to the base, a slideheld in the parallel bearings of said member and slidably movable uponsaid base in a direction perpendicular to its bearings upon said member,substantially as described. 7

12. The combination in a gyrating machine, of the horizontally-gyratingmember with the vertical base, the vertical crank-shaft provided in saidbase for operating said member and the horizontal non-rotative slideinterposed between said base and member and limiting the movement ofsaid member to gyration, substantially as described.

13. The combination in a gyrating machine, of the gyrating plate, withthe base, the rotating mechanism in said base for operating said plate,and the rigid slidable means consisting of an oscillating crossinterposed between said plate and said base, angularly operative andlimiting the movement of said plate to gyration, substantially asdescribed.

l t. The combination,in a gyrating machine, of the gyrating plate, withthe machine-base, the rotating mechanism provided in said base tooperate said plate, and positively-operating means consisting of asliding cross moving in hearings on said base and plate interposedbetween said base and plate and limiting the operation of said plate, bysaid rotating mechanism, to gyration, and said means also tying saidplate and base together, substantially as described.

15. The combination with a supporting base or frame, and a superposedgyrating body, of an intermediate slide supporting the latter on theformer, and guides therefor extending in directions at right angles toeach other on the gyrator and base, substantially as set forth.

16. The combination with a supporting base or frame, and a superposedgyrating body, of centrally-located means for gyrating the body, guidesarranged at right angles to each other, and a slide operated therein bythe gyrating body for controlling the movements of such body,substantially as set forth.

17. The combination with a supporting base or frame, and a superposedgyrating body, the former having guides on its upper surface and thelatter having guides at its under surface at right angles to the guideson the base, of an intermediate slide engaging said guides, for thepurpose set forth.

18. The combination with a gyrating body having guides at its undersurface, and aslide engaging said guides and supported on other guidesextending at right angles to the former guides, substantially as setforth.

19. The combination of a gyrating body having guides at its undersurface, with underlying independent guides extending at right anglesthereto in a parallel plane, and an intermediate slide operated by thegyrating body and operatively engaging such guides, substantially as setforth.

20. In a gyrator, a supporting base or frame, a gyratory body and meansfor gyrating it, a slide intermediate the base and gyratory body andsupporting the latter on the former, and straight-line guides on saidbase and body engaged by said slide, the guides on the base extending atangles to those on said body, substantially as set forth.

21. In a gyrator, a supporting base or frame, a gyratory body and meansfor gyrating it, parallel guides extending on the base, parallel guidesprovided on the bottom of the gyrating body and extending at angles tothe former guides, and intermediate connected sliding devices engagingboth of said sets of guides and adapted to be actuated by the gyratorybody, for the purpose set forth.

22. In a gyrating machine, the combination of the body with the base,bearings upon said body and base, parallel therewith andv at rightangles to one another, a member engaged with said bearings, preventingthe rotation of said body upon its axis, and a rotary device engagedwith said body and causing the gyration thereof, substantially asdescribed.

23. The combination in a gyrating machine of the body to be gyrated,with a suitable base, bearings upon said body and base, paralleltherewith and at right angles to one another, a member engaged with saidbearings, preventing the rotation of said body upon its axis andconfining its movement to gyration, a driving-shaft, a crank thereonengaged with said body, and a counter weight or balance upon said shaft,substantially as described.

24. In a gyrating machine, the combination 7 of the body to be gyratedwith a suitable support or base therefor, bearings provided upon saidbody and base, parallel therewith and at right angles to one another,aconnecting mechanism engaged with said bearings, securing said body uponsaid support, preventing the rotation of said body upon said support andpermitting only gyratory motion thereof, and a body-driving meanslocated centrally of the body, substantially as described.

In testimony whereof I have hereunto set my hand this 19th day ofAugust, 1899.

JOSEPH scHUTz.

In presence of C. G. HAWLEY, M. E. GrooLEY.

